PLEASE!!! upgrade ASAP!!!!
Fedora 12 is 8 and soon to be 9 versions OUT OF DATE
Fedora 12 has been UNSUPPORTED since it went END OF LIFE on 2010-12-02
12 is missing the last 3.5 YEARS of security updates !!!
DO NOT USE FEDORA 12 !!!!
Please install the current Fedora 20
Fedora 21 will be released this summer
as to printing
Did you set up and configure the printer ?
use the CUPS web interface
the above link is for YOUR computer "localhost"